of course, the biggest of all was a personal visit to osama bin laden. >> i've heard of him once or twice. part of the interest in a book like this, other than it bag great read, is the sort of fear and fascination with terrorism. do you feel like that fear is still as great in the population today as it was, say, ten years ago? >> it seems to be because we're seeing a new kind. they call it the clean skins. these are young men who the counterterrorist forces have never heard of, like the ones who did the boston bombing and the two nigerians who butchered that off-duty soldier in london. these are guys who seem to convert to insane, perhaps, certainly homicidal extremism, where even the drone can't penetrate. they are dangerous because there's no reported of them. they're just not on file. if they're on file, then, yes, usually if there's some big conspiracy involving chemicals and things, then yes, the counterterrorism forces intercept them, get a whisper, someone talks or sneaks. they have agents. when it's just one guy deciding, i am going to go and kill for allah, you can't do anythin